Water-insoluble benzimidazolone-(5)-sulfonamidophenylene-azo-aryl dyestuffs

ABSTRACT

THE PRESENT INVENTION RELATES TO NOVEL WATER-INSOLUBLE MONO- AND DISAZO DYESTUFFS OF THE GENERAL FORMULA   (5-(-NH-CO-CH(-CO-CH3)-N=N-(X1,X2-PHENYLENE)-SO2-NH-),R-   BENZIMIDAZOL-2-ONE)N A   WHEREIN X1 AND X2 MAY BE IDENTICAL OR DIFFERENT AND REPRESENT A HYDROGEN ATOM, A LOWER ALKYL OR ALKOXY GROUP HAVING PREFERABLY 1 TO 4 CARBON ATOMS, OR A HALOGEN ATOM PERFERABLY A CHLORINE OR BROMINE ATOM, AND R IS A HYDROGEN OR HALOGEN ATOM, METHOXY OR ETHOXY GROUP, N REPATOM, A METHYL, ETHYL, METHOXY OR ETHOXY GROUP, N REPRESENTS THE NUMBERS 1 OR 2 AND A AN OPTIONALLY SUBSTITUTED RADICAL, PREFERABLY OF THE BENZENE, NAPHTHALENE OR BENZIMIDAZOLONE SERIES OF N=1, AND OF THE BENZENE OR DIPHENYL SERIES IF N=2. THESE DYESTUFFS MAY BE USED FOR DYEING OR PRINTING LACQUERS, POLYMERS OR TEXTILE MATERIALS, THEY SHOW A GOOD FASTNESS TO LIGHT, TO WEATHER AND TO MIGRATION. FURTHERMORE, THEY ARE FAST TO HEAT, HAVE A HIGH TINCORIAL STRENGTH TO THE INFLUENCE OF CHEMICAL PRODUCTS, ESPECIALLY SOLVENTS, ACIDS AND ALKALIS.

United States Patent 01 hoe Claims priority, application Germany, Sept. 8, 1971, P 21 44 907.0 Int. Cl. C09b 33/16, 29/36 US. Cl. 260-457 4 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to novel water-insoluble monoand disazo dyestuifs of the general formula R l wherein X and X may be identical or different and represent a hydrogen atom, a lower alkyl or alkoxy group having preferably 1 to 4 carbon atoms, or a halogen atom, preferably a chlorine or bromine atom, and R is a hydrogen or halogen atom, preferably a chlorine or bromine atom, a methyl, ethyl, methoxy or ethoxy group, n represents the numbers 1 or 2 and A an optionally substituted radical, preferably of the benzene, naphthalene or benzimidazolone series of n=1, and of the benzene or diphenyl series if n=2.

These dyestuffs may be used for dyeing or printing lacquers, polymers or textile materials. They show a good fastness to light, to weather and to migration. Furthermore, they are fast to heat, have a high tinctorial strength and show in many cases pure shades. They are resistant to the influence of chemical products, especially solvents, acids and alkalis.

The present invention relates to novel Water-insoluble wherein X, and X may be identical or ditferent and represent a hydrogen atom, a lower alkyl or alkoxy group having preferably 1 to 4 carbon atoms, or a halogen atom, preferably a chlorine or bromine atom, and R is a hydrogen or halogen atom, preferably a chlorine or bromine atom, a methyl, ethyl, methoxy or ethoxy group, n represents the numbers 1 or 2 and A an optionally substituted radical, preferably of the benzene, naphthalene or benzimidazolone series if n: 1, and of the benzene or diphenyl series if n=2.

The invention further relates to a process for preparing the above-mentioned dyestuffs, which comprises coupling diazotized aromatic amines of the general formula 3,828,019 Patented Aug. 6, 1974 with coupling components of the general formula A [CH3 0 0cm 0 ONE-1 wherein X X R, n and A have the above meanings.

The diazo components used are novel. They may be prepared according to known methods, for example by condensation of sulfochlorides of the general formulae NH00CH3 with 5-amino-benzimidazolones of the general formula a 11 1i N\ =0 4-acetamino-benzenesulfochloride, 2-chloro-4-acetaminobenzene-sulfochloride, 3-chloro-4-acetaminobenzcne sulfochloride, 3-bromo-4-acetaminobenzene sulfochloride, 2,5-dichloro-4-acetaminobenzene sulfochloride, 3-methyl-4-acetaminobenzene sulfochloride, 3-n-butyl-4-acetaminobenzene sulfochloride, 2,5-dimethyl-4-acetaminobenzene sulfochloride, 2,5-di-n-propyl-4-acetaminobenzene sulfochloride, 2-chloro-5-ethyl-4-acetaminobenzene sulfochloride, 2,5-dimethoxy-4-acetaminobenzine sulfochloride 2,5-diethoxy-4-acetaminobenzene sulfochloride, 2-eth0Xy-5-meth0Xy-4-acetaminobenzene sulfochloride, Z-methyl-5-ethyl-4-acetaminobenzene sulfochloride, Z-methyl-5-ethoxy-4-acetaminobenzene sulfochloride, 2-chloro-5-methyl-4-acetaminobenzene sulfochloride, 2-methoxy-5-bromo-4-acetaminobenzene sulfochloride, 2-propoxy-S-chloro-4-acetaminobenzene sulfochloride, 2-chloro-5-ethoxy-4-acetaminobenzene sulfochloride, 3-acetaminobenzene sulfochloride, 4-chloro-3-acetaminobenzene sulfochloride, 4-methoxy-3-acetaminobenzene sulfochloride, 4-ethyl-3-acetaminobenzene sulfochloride, 6-chloro-4-ethyl-3-acetaminobenzene sulfochloride, 4,6-dimethyl-S-acetaminobenzene sulfochloride, 4-butoxy-3-acetaminobenzene sulfochloride, 4-methoxy-6-bromo-3-acetaminobenzene sulfochloride or 4-methyl-6-n-butyl-3-acetaminobenzene sulfochloride.

There are also considered starting compounds which differ from the above-mentioned ones by the fact that they carry a nitro group instead of the acetamino group. Especially preferred are 4-acetylamino or 4-nitrobenzenesulfochlorides which carry hydrogen or chlorine atoms or methoxy groups in a 2- and 5-.position.

As 5-amino-benzimidazolones there may be used for example:

S-amino-benzimidazolone 6-chloro-5-amino-benzimidazolone 7-chloro-5-amino-benzimidazolone 6-bromo-S-amino-benzimidazolone 7-bromo-5-amino-benzimidazolone 6-methyl-5-amino-benzimidazolone 7-methyl-5-amino-benzimidazolone 7-ethyl-S-amino-benzimidazolone 7-metl1oxy-i-amino-benzimidazolone 7 -ethoxy--amino-benzimidazolone Most of the compounds used as coupling components of the general formula A [CH3 C OCHaC ONE-1 are described in the literature and may be prepared according to known methods, for example by reacting an aromatic mono or diarnine with diketene or acetoacetic acid methyl ester. Suitable coupling components are:

N-acetoacetylaniline 1-acetoacetylarnino-naphthalene N-acetoacetyl-2-chloro-aniline N-acetoacetyl-4-chloro-aniline N-acetoacetyl-Z,4-dichloro-ani1ine Z-acetoacetylamino-auisole 4-acetoacetylamino-anisole 4-acetoacetylamino-phenetole N-acetoacetyl-2,S-dirnethoxy-aniline N-acetoacetyl-2,4-dimethoxy-aniline N-acetoacetyl-4-chloro-2,S-dimethoxy-aniline N-acetoacetyl-S-chloro-2,4-dimethoxy-aniline 2-acetoacetylamino-toluene 4-acetoacetylamino-toluene 4-acetoacetylamino-1,3-xylene 4-acetoacetylamino-acetylaminobenzene 2-acetoacetylamino-S-chloro-toluene Z-acetoacetylamino-S-acetylamino-4-chloro-toluene S-acetoacetylamino-benzimidazolone S-acetoacetylamino-6-chloro-benzimidazolone S-acetoacetylamino-7-chloro-benzimidazolone 1,4-bis-acetoacetylaminobenzene l ,4-bis-acetoace tylamino-Z-chloro-benzene 1,4-bis-acetoacetylamino-2,S-dichloro-benzene 2,S-bis-acetoacetylamino-toluene 2,5-bis-acetoacetylamino-1,4-xylene 2,5-bis-acetoacetylamino-anisole 1,4-bis-acetoacetylamino-2,S-dimethoxy 'benzene 2,S-bis-acetoacetylamino-4-methoxy-toluene N,N-bis-acetoacetyl-benzidine N,N-bis-acetoacetyl-3 ,3 '-dichloro-benzidine N,N'-bis-acetoacetyl-2,2'-dichlorobenzidine N,N'-bis-acetoacetyl-3,3'-dirnethoxy benzidine N,N'-bis-acctoacetyl-3,3'-dimethyl-benzidine The monoand diazo dyestuffs of the invention are prepared according to known processes, for example by coupling the diazotized aromatic amines with the coupling components in an aqueous medium, preferably in the presence of a non-ionic anion-active or cation-active dispersing agent or in the presence of an organic solvent. The coupling reaction may also be carried out in organic solvents. In some cases the diazonium salts are difiicultly soluble in an aqueous medium and they precipitate. They may be isolated and coupled as a moist paste. Diazotation may also be performed in a suitable organic medium, for example in glacial acetic acid, alcohol, dioxane, tetrahydrofurane, formarnide, dimethyl formamide or dimethyl sulfoxide and the solution thus obtained of the diazonium compound may be combined with the coupling component.

It is often suitable to subject the dyestuffs thus obtained to an after-treatment, in order to achieve the full color intensity and a particularly suitable crystal structure. For this purpose the moist or dried and ground dyestuffs are heated for some time under reflux or up to higher temperatures under pressure in pyridine, dimethyl formamide or other organic solvents such as dirnethyl sulfoxide, alcohol, chlorobenzene, dichlorobenzene, glacial acetic acid, quinoline, glycol or nitrobenzene. In some cases the conversion into a particularly suitable crystal structure is obtained by heating with water to boil or up to higher temperatures under pressure, if desired, under addition of dispersing agents and, if desired, under addition of organic solvents, for example of the above-mentioned type.

The new dyestuifs are water-insoluble pigments. They are suitable for preparing colored lacquers, lacquer formers, solutions and products of acetyl cellulose, natural or synthetic resins, such as polymerization or condensation resins, as for example aminoor pheno-plast resins, as well as of polystyrene, polyolefines, such as polyethylene or polypropylene, polyacrylic compounds, polyvinyl compounds such as polyvinyl chloride or polyvinyl acetate, polyesters, rubber, casein or silicone resins.

The new pigment dyestuffs are also suitable for pigment printing on substrates, especially textile fibre materials or other articles having a plane surface, such as paper.

The dyestuifs may also be used for other purposes, for example in a finely divided form for dyeing viscose rayon or cellulose ethers, or esters, polyamides, polyurethanes, polyglycol terephthalates or polyacrylonitrile in the spinning mass, or for dyeing paper.

The dyestuffs show in the mentioned media a good fastness to light, to weather and to migration. Furthermore, they are fast to heat, have a high tinctorial strength and show in many cases pure shades. They are resistant to the influence of chemical products, especially solvents, acids and alkalis.

Among the dyestuffs according to the invention, the following ones are characterized by their excellent fastness properties and the brilliant shades frequently very pure:

CH -CO-?H-CONH --Cl N I ll 0 CH O CH;

H N soaNH The following Examples illustrate the invention. Parts and percentages are by weight unless stated otherwise. The relationship between parts by weight and parts by volume is as grams to cubic centimeter.

EXAMPLE 1 36.45 parts of 5-(2,5'-dimethoxy-4-amino-benzene-sulfonylamino)-benzimidazolone were stirred for One hour with 200 parts by volume of glacial acetic acid and 30 parts by volume of a 37% hydrochloric acid and diazotized at -15 C. with 22 parts by volume of a 5N sodium nitrite solution. Stirring was continued for 30 minutes, the mixture was diluted with 200 parts by volume of ice water, the excess of nitrite was destroyed with amidosulfonic acid and the mixture was clarified.

30 parts of N-acetoacetyl-4-chloro-2,5-dimethoxy-aniline were dissolved in 100 parts by volume of water and 10 parts by volume of a 33% sodium hydroxide solution and the solution was clarified. 300 parts by volume of water, 12 parts by volume of glacial acetic acid and 10 parts by volume of a 10% aqueous solution of the reaction prodnot of 1 mol of stearylic alcohol with 20 mols of ethylene oxide were introduced into the coupling vessel. The temperature was adjusted to 5 C. by addition of ice and the clarified solution of the coupling component was added dropwise. Then the temperature was increased to 20 C. and the diazonium salt solution was slowly introduced. By introducing simultaneously 700 parts by volume of 2N sodium hydroxide solution, the pH value was maintained at 5.56.5.

When the coupling was terminated, the mixture was heated to 95 C. by introducing steam, this temperature was maintained for 15 minutes, the dyestutf was suctionfiltered, washed with water and dried at 65 C. The dried dyestutf was ground, refluxed with 600 parts by volume of glacial acetic acid for 30 minutes, suction-filtered hot, washed with water, dried and ground.

When being incorporated into polyvinyl chloride, into a lacquer, a printing ink or a spinning mass, the pigment dyestufi thus obtained of the formula provided pure reddish yellow colorations having a very good fastness to heat, to migration and to light.

EXAMPLE 2 36.45 parts of 5 (2',5-dimethoxy-4'-amino-benzenesulfonylamino)-benzimidazol0ne were diazotized as in Example 1.

24.6 parts of S-acetoacetylamino-benzimidazolone were dissolved in 150 parts by volume of a 2N sodium hydroxide solution, mixed with a solution of 66 parts of sodium acetate in 400 parts by volume of water and clarified into the coupling vessel. After the addition of 10 parts by volume of a 10% aqueous solution of the reaction product of 1 mol of stearylic alcohol and mols of ethylene oxide, the coupling component was reprecipitated by introducing rapidly 146 parts by volume of a 2N acetic acid. The diazonium salt solution was slowly added dropwise to the suspension thus obtained, while the pH value was maintained at 5-6.5 by introducing simultaneously a 2N sodium hydroxide solution. When the coupling was terminated,

the reaction mixture was heated for one hour to C., the dyestuif was suction-filtered hot and washed with hot water.

The moist press cake was put into a pressure vessel and the contents of water was determined with a sample. An amount of water was added so that the press cake contained 300 parts of water, 300 parts by volume of ethanol were added, and the mixture was heated for 9.5 hours under pressure up to C. After cooling the dyestutf was suction-filtered, washed with water, dried and ground.

When being incorporated into polyvinyl chloride, into a lacquer, a printing ink or a spinning mass, the pigment dyestuff thus obtained of the formula OCH provided pure reddish yellow colorations having a very good fastness to heat and a very good fastness to light and to migration.

If in the above Example the 5-(2,5'-dimethoxy-4'-aminobenzene-sulfonylamino)-benzimidazolone was replaced by the equivalent amount of 5 (2',5-diethoxy-4'-aminoben zene-sulfonylamino)-benzimidazolone, a yellow pigment was also obtained which-after being incorporated into polyvinyl chloride, a lacquer, a printing ink or a spinning mass-also provided reddish yellow colorations having similar good fastness properties.

EXAMPLE 3 36.45 parts of 5-(2,5-dimethoxy-4'-amino-benzenesulfonylamino)-benzimidazolone were diazotized as in Example 1.

16.8 parts of N,N-bis-acetoacetyl-2,5-dimethoxy-1,4-di aminobenzene were dissolved, while heating, in 350 parts by volume of pyridine, mixed with 10 parts by volume of a 10% aqueous solution of the reaction product of 1 mol of stearylic alcohol with 20 mols of ethylene oxide and cooled to 20 C. Then the diazonium salt solution was introduced slowly and stirring was continued for 2 hours. The dyestuff was suction-filtered, washed with water, dried, ground and heated in a pressure vessel with 450 parts by volume of ethanol for 5 hours to 150 C. After cooling it was suction-filtered again, dried and ground. When being incorporated into polyvinyl chloride, into a lacquer, a printing ink or a spinning mass, the pigment dyestutf thus obtained of the formula provided orange dyeings having a very good fastness to heat and a very good fastness to light and to migration.

7 EXAMPIJE 4 36.45 Par-ts of 5-'(2,S'-dimethoxy-4-amino-benzenesulfonylamino)-benzimidazolone were diazotized as in Example 1. 19 Parts of N,N'-bis-acetoacetyl-3,3'-dirnethyl-benzidine were dissolved hot in 400 parts by volume of pyridine, mixed with parts by volume of a 10% aqueous solution of the reaction product of '1 mol of stearyiic alcohol with mols of ethylene oxide and cooled to 20 C. Then the diazonium salt solution was slowly added dropwise. Stirring was continued for two hours, the whole was suctiomfiltered, washed with water, dried, ground and refluxed for 2.5 hours with a mixture of 270 parts by volume of dimethyl formamide and 30 parts by volume of water. The dyestufi was suction-filtered again, washed with ethanol, dried and ground.

When being incorporated into polyvinyl chloride, into a lacquer, a printing ink or a spinning mass, the pigment dye-stuff thus obtained of the formula --OCH3 omrrl N H N I SzONH- provided pure yellow colorations having a good fastness to heat and a good fastness to light and to migration.

The following Table contains a number of further components to be used according to the invention as well as the shades of the graphic prints of the dyestufis prepared thereof.

2-chloro-benzene.

TABLE-Continued Diazo component Coupling component Shade 5-(2,5-din1ethoxy-l-amino- N-aectoacctylanilino Yellow benzenesultonylamiuo)- benzilnidazolono.

Do 1,4-his-aoetoacotylarr1ino- Do.

2,5-diohlorobonzene. Do 2,5 bis-aoetoaoetylamino- Do.

toluene. 2,5-bis-acetoacetylamino- Reddish lAxylene. yellow. 2,5-bis-aoetoacet-ylamino- Do.

anisolo. 2,5-bisacetoeeetylamino- Do.

4-methoxy-toluene. N,N'-bis-acetoaoetyl- D0.

benzidine. N,N'-bis-acetoacetyl-3,3'- Yellow.

dichloro-benzidine. N,N"bis'acetoacetyl-ZW- Do.

(llChlOl'O-bellZldlIle. N,N-bis-acetoacetyl-3,3- D0.

dimothoxy-benzidine. 5-(5-methoxy-2-methyl4'- N-acetoacetyllchloro-2,5- D0.

amino-benzenesulionyldimethoxyeniline. amino)-benzimidazolone.

Do S-aeetoacotylamlno- Do.

benzimidazolone. fi-chlordS-(Z,5'-dlmethoxydo Reddish 4-amino-benzene sulionylyellow. amino)-benzimidaz0lone. 7-chloro-5-(2', 5'-dimethoxyr10 Do.

4-a.mino-benzene sulionylamino)-beuzimidazolone.

Do N-acotoaoetyl-eniline Yellow.

N-acetoacetyl-iehlorodfi- Do.

dimethoxy-aniline. 6-bromo-5-(2', 5'-dirnethoxyl,4-bis-acetoacetylamino-2,5- Reddish 4-amjno-benzene sulionyldimethoxy-benzene. yellow. amino)-benzimidazolone. 7-bromo-5-(2,5-dirnethoxydo Do.

4-amino-benzene snlfonylamino)-bonzimi lazolone. 6-methyl-5-(2',5'-dimethoxydo Do.

4 amino-benzene sulfonylamino)-benzimidazolone.

Do N-aeetoacetyl-4-ohloro-2,5- Yellow.

dimethoxy-aniline. Do 5-acet-oacetylaminobenzim1d- Do.

azolone. 7-methyl-5-(2,5-dimethoxydo Do.

4'-amino-benzene sulfonylamino)-benzimidazolone.

Do SacetoacetylaminO-T- Do.

chloro-benzimidazolone. 7-ethyl-5-(2,5- limethoxy-4'- do D0.

amino-benzene sultonylamino)-benzimidazolone. 7-meth0xy-5-(2,5'-dirnethoxy- 5-acetoaoetylaminobenzim- Do.

1:amino-benzene sulfonylidazolone. amino)-benzimidazolone.

Do N-acet-oacotylA-chloro-2,5- Do.

dimethoxy-aniline. 7-ethoxy-5-(2',5-dimothoxydo Do.

4'-aminobenzenesulfonylaminol-benzimidazolone. 7'cbloro-5-(5 metlioxy-2 do Do.

methyl-4-amino-benzene sulfonylamlno)-benzimidazolone.

D0 5-acetoacetylaminobenzimid- Beddish azolone. yellow. 5-(4'-a.minobenzenesulfonyl- N-acetoacetylaniline- Yellow.

amino)-benzim.idazolone. 5-(2-rnethy1-5-othoxy 4'- l,4.-bis-acetoacotylarnino- Do.

aminobenzonesulfonyl- 2,5-dichlorobenzene. emino)-benzimidazolono. -(2,5-diethoxy-4-arninodo D0.

benzenesulfonylamino)- benzimidazolone. 5-(2,5-dichloro-4-amino- 5-acotoacetylaminobenzim- Do.

benzenesulfonylarnino)- idazolone. benzimidazolone.

5-(2-ohloro-5-methyl-4"- do Do.

amino-benzenesulionylamino)-benzimidazolone. 5-(2'-chloro-5-methoxy-4- do D0.

aminobenzenesulfonylamino)-benzimidazolone. 5-(3-aminobenzenesulfonyl- 5-acetoaoetylamino-7-ohloro- Do.

amino)-benzimidazolone. benzirnidazolone. 5-(3-aminoi-methyl- 5-aoetoacetylamlno-7- D0.

benzenesulfonylamino)- chloro-benzinfidazolone. benzimidazolone. 5-(3-amino-4methoxyben- N-acetoacetylaniline Do.

zene-sulionylamino)- benzimidazolone. 5-(3-amino-4,6-dirnethyl- S-acetoacetylaminobcnzim- Do.

benzone-sulfonylamino)- idazolone benzimidazolone. -(3-amino-4-ehloro-6- 1,4bis-aoetoacetylamino-2, Reddish methyl-benzenesultonylo-dimethoxybenzene. yellow. amino)-benzimidazolone. 5-(3"amin0-6"mot;hyl N-acetoacetylaniline Yellow.

benzenesnlionylamino)- benzimidazolone.

We claim:

1. A dyestufi of the formula wherein X and X each is hydrogen, chlorine, bromine, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms, R is hydrogen, chlorine, bromine, methyl, ethyl, methoxy or ethoxy, n is 1 or 2, and A is phenyl, naphthyl or benzimidazolyl if n is 1 or phenyl or diphenyl if n is 2.

2. The dyestuif of the formula HaCO 3. The dyestuff of the formula OCH;

4. The dyestuif of the formula OCH;

. 3,328,384 2,840,552 Re. 25,857 Re. 27,575

References Cited UNITED STATES PATENTS Dietz et a1. 260- 157 Sureau et a1. 2601S7 Schilling et al. 260157 'Ribka et a1. 260157 FLOYD D. HIGEL, Primary Examiner R. W. RA'MSUER, Assistant Examiner US. Cl. X.R.

260309.2, 239. 9; 106-2'3, 288 Q, 308 Q; 117123 C,

138, '8 R, 138.8 F, 138. 8 B, 138.8 'PV, 138.8 UA, 139,

14 3, R, 154 OC 

